diff --git a/src/formdata/FormData.php b/src/formdata/FormData.php
index 352d079..1015fb0 100644
--- a/src/formdata/FormData.php
+++ b/src/formdata/FormData.php
@@ -42,16 +42,16 @@ public function getValue(string $key) {
     private function initValuesFromArray(array $values, bool $recursion = false): array {
         $result = [];
         foreach($values as $key => $value) {
-            if (is_string($value)) {
+            if (\is_string($value)) {
                 $result[$key] = $value;
                 continue;
             }
-            if ($recursion === false && is_array($value)) {
+            if ($recursion === false && \is_array($value)) {
                 $result[$key] = $this->initValuesFromArray($value, true);
                 continue;
             }
             throw new FormDataException(
-                sprintf('Data type "%s" in key "%s" not supported', gettype($value), $key)
+                sprintf('Data type "%s" in key "%s" not supported', \gettype($value), $key)
             );
         }
 
diff --git a/src/snippet/SnippetList.php b/src/snippet/SnippetList.php
index eb17ad5..3c1287b 100644
--- a/src/snippet/SnippetList.php
+++ b/src/snippet/SnippetList.php
@@ -34,7 +34,7 @@ public function rewind() {
     }
 
     public function count(): int {
-        return count($this->snippets);
+        return \count($this->snippets);
     }
 
 }
diff --git a/src/viewmodel/SnapshotDOMNodelist.php b/src/viewmodel/SnapshotDOMNodelist.php
index b2208b1..e8fb6f9 100644
--- a/src/viewmodel/SnapshotDOMNodelist.php
+++ b/src/viewmodel/SnapshotDOMNodelist.php
@@ -24,7 +24,7 @@ public function __construct(DOMNodeList $list) {
     }
 
     public function count() {
-        return count($this->items);
+        return \count($this->items);
     }
 
     public function hasNode(DOMNode $node) {
@@ -66,7 +66,7 @@ public function key(): int {
     }
 
     public function valid(): bool {
-        $count = count($this->items);
+        $count = \count($this->items);
         return $count > 0 && $count > $this->pos;
     }
 
@@ -81,7 +81,7 @@ private function extractItemsFromNodeList(DOMNodeList $list) {
     }
 
     public function hasNext(): bool {
-        $count = count($this->items);
+        $count = \count($this->items);
         return $count > 0 && $this->pos < $count;
     }
 
diff --git a/src/viewmodel/ViewModelRenderer.php b/src/viewmodel/ViewModelRenderer.php
index c90ec47..02ea2ab 100644
--- a/src/viewmodel/ViewModelRenderer.php
+++ b/src/viewmodel/ViewModelRenderer.php
@@ -105,7 +105,7 @@ private function dropFromStack() {
      */
     private function applyCurrent(DOMElement $context): DOMNode {
         $model = $this->current();
-        switch (gettype($model)) {
+        switch (\gettype($model)) {
             case 'boolean': {
                 return $this->processBoolean($context, $model);
             }
@@ -125,7 +125,7 @@ private function applyCurrent(DOMElement $context): DOMNode {
 
             default: {
                 throw new ViewModelRendererException(
-                    sprintf('Unsupported type %s', gettype($model))
+                    sprintf('Unsupported type %s', \gettype($model))
                 );
             }
         }
@@ -194,9 +194,8 @@ private function processObjectAsModel(DOMElement $context, $model): DOMElement {
      * @throws ViewModelRendererException
      */
     private function processArray(DOMElement $context, $model): DOMDocumentFragment {
-        $count = count($model);
-        if ($context->isSameNode($context->ownerDocument->documentElement) &&
-            $count > 1) {
+        $count = \count($model);
+        if ($count > 1 && $context->isSameNode($context->ownerDocument->documentElement)) {
             throw new ViewModelRendererException(
                 'Cannot render multiple copies of root element'
             );
@@ -288,10 +287,10 @@ function (&$value, $pos) { $value = ucfirst($value); }
                 return;
             }
 
-            if (!is_string($value)) {
+            if (!\is_string($value)) {
                 throw new ViewModelRendererException(
                     sprintf('Attribute value must be string or boolean false - type %s received from $model->%s',
-                        gettype($value),
+                        \gettype($value),
                         implode('()->', $this->stackNames) . '()'
                     )
                 );
@@ -307,12 +306,12 @@ function (&$value, $pos) { $value = ucfirst($value); }
      * @throws ViewModelRendererException
      */
     private function ensureIsObject($model, string $property) {
-        if (!is_object($model)) {
+        if (!\is_object($model)) {
             throw new ViewModelRendererException(
                 sprintf(
                     'Trying to add "%s" failed - Non object (%s) on stack: $%s',
                     $property,
-                    gettype($model),
+                    \gettype($model),
                     implode('()->', $this->stackNames) . '() '
                 )
             );